/* Applet to display raw text from a URL in a text area.

 Copyright (c) 2000-2003 The Regents of the University of California.
 All rights reserved.
 Permission is hereby granted, without written agreement and without
 license or royalty fees, to use, copy, modify, and distribute this
 software and its documentation for any purpose, provided that the above
 copyright notice and the following two paragraphs appear in all copies
 of this software.

 IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
 FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
 THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGE.

 THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
 PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 ENHANCEMENTS, OR MODIFICATIONS.

                                        PT_COPYRIGHT_VERSION_2
                                        COPYRIGHTENDKEY

@ProposedRating Red (eal@eecs.berkeley.edu)
@AcceptedRating Red (eal@eecs.berkeley.edu)
*/

package ptolemy.gui.demo;

import ptolemy.gui.BasicJApplet;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

//////////////////////////////////////////////////////////////////////////
//// ShowRawDocumentApplet
/**
Applet to display raw text from a URL in a TextArea.

This applet is useful for displaying raw xml source with out processing
it.  If you would like to display a document within a browser with regular
processing, see the documentation for appletContext.showDocument(sourceURL).

@author  Christopher Hylands
@version $Id: ShowRawDocumentApplet.java,v 1.9 2003/05/16 23:16:55 cxh Exp $
@since Ptolemy II 0.4
*/
public class ShowRawDocumentApplet extends BasicJApplet {
    /** Constructor.
     */
    public ShowRawDocumentApplet() {
        super();
    }

    ///////////////////////////////////////////////////////////////////
    ////                         public methods                    ////

    /** Read applet parameters, open the URL and display the contents
     *  in a TextArea.
     */
    public void init() {
        super.init();

        // Process the rows and columns applet parameters
        int rows, columns;
        String rowsString = getParameter("rows");
        if (rowsString != null)
            rows = Integer.parseInt(rowsString);
        else
            rows = 10;

        String columnsString = getParameter("columns");
        if (columnsString != null)
            columns = Integer.parseInt(columnsString);
        else
            columns = 40;

        // Get the source applet parameter before we create the
        // _jTextArea in case there are problems with the parameter.
        String sourceURLString = getParameter("source");
        URL sourceURL = null;
        if (sourceURLString != null) {
            try {
                showStatus("Reading data . . .");
                sourceURL = new URL(getDocumentBase(), sourceURLString);
            } catch (MalformedURLException e) {
                System.err.println(e.toString());
            }
        }

        /*JFrame _frame = */ new JFrame();
        _jTextArea = new JTextArea(rows,columns);
        _jTextArea.setEditable(false);
        _scrollPane = new JScrollPane(_jTextArea);
        getContentPane().add(_scrollPane);

        String newline = System.getProperty("line.separator");
        // Read in the data one line at a time.
        try {
            InputStream in = sourceURL.openStream();
            _bufferedReader = new BufferedReader(new InputStreamReader(in));
            String line = _bufferedReader.readLine();
            while (line != null) {
                _jTextArea.append(line + newline);
                line = _bufferedReader.readLine();
            }
            showStatus("Done");
        } catch (FileNotFoundException e) {
            System.err.println("File not found: " +e);
        } catch (IOException e) {
            System.err.println("Error reading input file: " + e);
        }

        //getContentPane().add(_frame);
        //getContentPane().add(_jTextArea);
        validate();
        repaint();
    }

    /** Describe the applet parameters.
     *  @return An array describing the applet parameters.
     */
    public String[][] getParameterInfo() {
        String newinfo[][] = {
            {"columns", "integer", "40"},
            {"rows", "integer", "10"},
            {"source", "", "URL of the file to be displayed"},
        };
        return _concatStringArrays(super.getParameterInfo(), newinfo);
    }

    ///////////////////////////////////////////////////////////////////
    ////                         private variables                 ////

    private BufferedReader _bufferedReader;
    private JTextArea _jTextArea;
    private JScrollPane _scrollPane;
}